//
// Copyright (C) 2024 EA group inc.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//
//

#pragma once

#include <string>

#include <turbo/base/config.h>

namespace turbo::base_internal {

    class ScopedSetEnv {
    public:
        ScopedSetEnv(const char *var_name, const char *new_value);

        ~ScopedSetEnv();

    private:
        std::string var_name_;
        std::string old_value_;

        // True if the environment variable was initially not set.
        bool was_unset_;
    };

}  // namespace turbo::base_internal
